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-rw-r--r--Documentation/devicetree/bindings/serial/of-serial.txt12
1 files changed, 12 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/serial/of-serial.txt b/Documentation/devicetree/bindings/serial/of-serial.txt
index bea60ef6cdc5..91d5ab0e60fc 100644
--- a/Documentation/devicetree/bindings/serial/of-serial.txt
+++ b/Documentation/devicetree/bindings/serial/of-serial.txt
@@ -19,6 +19,7 @@ Required properties:
- "altr,16550-FIFO64"
- "altr,16550-FIFO128"
- "fsl,16550-FIFO64"
+ - "fsl,ns16550"
- "serial" if the port type is unknown.
- reg : offset and length of the register set for the device.
- interrupts : should contain uart interrupt.
@@ -43,6 +44,17 @@ Optional properties:
driver is allowed to detect support for the capability even without this
property.
+Note:
+* fsl,ns16550:
+ ------------
+ Freescale DUART is very similar to the PC16552D (and to a
+ pair of NS16550A), albeit with some nonstandard behavior such as
+ erratum A-004737 (relating to incorrect BRK handling).
+
+ Represents a single port that is compatible with the DUART found
+ on many Freescale chips (examples include mpc8349, mpc8548,
+ mpc8641d, p4080 and ls2085a).
+
Example:
uart@80230000 {